Cracked Tire - should I be concerned?

[Joe_W]

Tyre swapping is not really a good idea, as far as I know. Crakcing _usually_ comes from riding with too low pressure, don't know if this applies there. I'd probably keep the tyre in the rear, look at the cracks when I top up the tyre and replace it once it starts bulging.
Oh, and you could place some sort of shim under that area inside the tyre. Some smoothed down pieces of old tyre should work.